CN102802189A - Device for realizing GSM-R (Global System for Mobile Communications for Railways) signal coverage and QOS (Quality of Service) condition monitoring - Google Patents
Device for realizing GSM-R (Global System for Mobile Communications for Railways) signal coverage and QOS (Quality of Service) condition monitoring Download PDFInfo
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- CN102802189A CN102802189A CN2012103092754A CN201210309275A CN102802189A CN 102802189 A CN102802189 A CN 102802189A CN 2012103092754 A CN2012103092754 A CN 2012103092754A CN 201210309275 A CN201210309275 A CN 201210309275A CN 102802189 A CN102802189 A CN 102802189A
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Abstract
The invention discloses a device for realizing GSM-R (Global System for Mobile Communications for Railways) signal coverage and QOS (Quality of Service) condition monitoring. A near/far-end machine system of a railway optical fiber repeater comprises a near-end machine and a plurality of far-end machines connected with the near-end machine through optical fibers; and each far-end machine is connected with corresponding front-end equipment of a GSM-R system, the near-end machine and the far-end machines are connected through the optical fibers and provide a 100Mbps Ethernet high-speed transparent transmission channel, the near-end machine is connected with OMC (Operation and Maintenance Center) equipment through an Ethernet, and the OMC equipment is further connected with a database server and a client side. According to the invention, the GSM-R signal coverage and QOS real-time monitoring are realized, the 100Mbps Ethernet high-speed transparent transmission channel provided between the near-end machine and the far-end machines of the optical fiber repeater is used to realize the communication between front-end measurement equipment and a background server, so that the instantaneity and the reliability in communication are guaranteed, and the problem that the traditional ADT (Automated Data Transfer) system cannot upload acquired data in real time due to wireless environment deterioration is solved.
Description
Technical field
The present invention relates to the GSM-R wireless communication field, specifically is that a kind of realization GSM-R signal covers and the QOS device for monitoring.
Background technology
GSM-R (GSM for Railways) system is the comprehensive special digital GSM that designs for railway communication specially; It is at the advanced speech call function of the specification protocol of GSMPhase2+; Seize on the basis with forced release service like group calling, broadcast & call, multipriority; Add functions such as location dependent addressing and functional addressing, be applicable to the particularly needs of Railway Special dispatching communication of railway communication.Train dispatch radio communication mainly is provided, function of voice communication such as the communication that makes up of trains, section maintenance operation communication, emergency communication, tunnel communication; Can be the automatic control of train and data transmission channel is provided, and train automatic addressing and passenger's service can be provided with detection information.GSM-R is carrying row control signal, and reliability requirement is high.How to realize railway GSM-R wireless coverage quality, signal strength and QOS (Quality of Service along the line; Service quality) monitoring is the problem that must solve; And the traditional monitoring data upload adopts the ADT system; The ADT system front end equipment wireless technologys such as adopting GPRS of communicating by letter with background server, control command issues when wireless environment worsens, image data uploads interruption, can not reflect the variation of wireless environment in real time.
Summary of the invention
Technical problem to be solved by this invention provides a kind of GSM-R system monitoring device that can effectively monitor railway GSM-R wireless coverage quality, signal strength and QOS situation along the line.
A kind of device of realizing covering of GSM-R signal and QOS condition monitoring of the present invention; It operates in the existing railway optical fiber repeater near and remote machine system; Railway optical fiber repeater near and remote machine system comprises the near-end machine, the some remote terminations that link to each other through optical fiber with the near-end machine; Each remote termination links to each other with corresponding GSM-R system front end equipment; Ethernet high speed pass-through channel is provided between near-end machine and the remote termination; The near-end machine then is connected to the base station, and the base station links to each other with OMC equipment through ethernet network again, and OMC equipment links to each other with database server and client again.
Further; Said GSM-R system front end equipment comprises mainboard; Mainboard is provided with general-purpose interface; Said general-purpose interface connects GPS module, GSM-R acquisition module, voice evaluation module, memory module, WiFi module and AM access module respectively, and wherein AM access module links to each other with remote termination, is perhaps linked to each other with remote termination through wireless aps by the WiFi module.
As preferred version, this AM access module is the optical module with 100Mbps Ethernet high speed pass-through channel.
In addition, said mainboard also comprises USB Hub expander and controller, and both are connected with general-purpose interface respectively.
Repeater near-end machine among the present invention inserts the railway Ethernet; Headend equipment lays along the railway and inserts the transparent transmission interface of repeater remote termination; The high speed pass-through channel that utilizes that optical fiber repeater is near, provides between the remote termination is realized communicating by letter of front end measuring equipment and background server; OMC equipment issues control information, and headend equipment is uploaded image data in real time, has avoided traditional ADT system to worsen the problem that causes image data not upload in real time because of wireless environment.Headend equipment of the present invention adopts modularized design, supports hot plug, automatically configuration; And it is low to have a cost, and equipment is installed simple, the advantage that extensibility is good.Engineering construction of the present invention is simple, need not interrupt existing communication service, has realized that the GSM-R signal covers and QOS monitors in real time.
Description of drawings
Fig. 1 is a sketch map of the present invention,
Fig. 2 is the structural representation of GSM-R system front end equipment among the present invention,
Fig. 3 is the schematic diagram of headend equipment.
Embodiment
Like Fig. 1, the present invention is the device of a kind of GSM-R of realization signal covering and QOS condition monitoring, and this device operates on the far and near optical transceiver system capable of existing railway.
It operates in the existing railway optical fiber repeater near and remote machine system, and railway optical fiber repeater near and remote machine system comprises the near-end machine, the some remote terminations that link to each other through optical fiber with the near-end machine; Each remote termination links to each other with corresponding GSM-R system front end equipment; Closely, remote termination connects through optical fiber and 100Mbps Ethernet high speed pass-through channel is provided; The near-end machine then links to each other with OMC equipment through ethernet network, and OMC equipment links to each other with database server and client again.
Like Fig. 2; GSM-R system front end equipment comprises mainboard; Mainboard is provided with USB Hub expander, controller and general-purpose interface; USB Hub expander is connected general-purpose interface respectively with controller, and general-purpose interface connects GPS module, GSM-R acquisition module, voice evaluation module, memory module, WiFi module and ethernet communication module more respectively, and the ethernet communication module links to each other with corresponding remote termination.
Operation principle of the present invention:
The present invention mainly comprises headend equipment and server platform two large divisions; Headend equipment carries out the measurement of wireless signal according to the test plan of setting, scheme (perhaps server issue instruction); Measurement data generates report file and upload server by the time granularity; Server compares measured data values and standard value, generates alarm when unusual.All data of intermodule all take ICP/IP protocol to transmit.
Fig. 2 is the structural representation of headend equipment, and headend equipment is according to the real-time command of predefined testing scheme or server platform, accomplishes the collecting work of relevant wave point data, and test data is stored in the storage card that front end carries.Test data uploads to far-end server in real time or by the time of arranging.
The headend equipment functional characteristic: the GSM-R standard is supported in (1).(2) be applicable to railway fixed test along the line.(3) power module is provided, the non-stop run when outage of assurance system, internal battery can guarantee that the equipment operate as normal is no less than 3 hours.(4) OMC can carry out remote maintenance and monitoring in real time to headend equipment.(5) support local maintenance and control.(6) can carry out the remote software auto-update.(7) can gather complete space interface signaling message and network parameter (optional) in real time.(8) mass storage is provided, satisfies the preservation of all test datas, read/write speed is greater than 9MB/s.(9) test data automatically, in real time or regularly is uploaded to background server.
The server platform framework comprises:
(1) management server
Back-stage management server is responsible for operations such as the transmitting-receiving of data parsing storage, device data, user's login authentication.
(2) monitor client
Monitor client is an operating maintenance terminal, is responsible for data parsing and shows, assigns user instruction, equipment disposition operation etc.
(3) database server
Be responsible for memory device reported data, recording operation admin log.
In the work, headend equipment adopts wifi (or wireless data sending mode) to insert the repeater remote termination; The repeater is near, 100Mbps Ethernet high speed pass-through channel is provided between remote termination; Repeater near-end machine is communicated by letter with OMC through the railway transmission network; OMC issues control information, and headend equipment is uploaded image data in real time.
Headend equipment is long-range setting, unattended duty, can adapt to bad working environment, has good reliability and higher integrated level.Its key equipment is: acquisition module, data transmission module, global location GPS (optional), memory device, power supply unit, CPU.
Headend equipment is according to the real-time command of predefined testing scheme or server platform, accomplishes the collecting work of relevant wave point data, and test data is stored in the storage card that front end carries.Test data uploads to far-end server in real time or by the time of arranging.
The test plan that the main receiving platform of headend equipment issues is accomplished collection, storage and the passback of test data, accomplishes the assessment of voice quality, provide simultaneously with Platform Server between the interface of communicating by letter.Headend equipment structure theory of constitution is as shown in Figure 3:
1, data acquisition unit:
Accomplish the collecting work of air interface test data, in the GSM-R working frequency range, gather downlink signal levels and signal quality, its core is the frequency sweep module.The frequency sweep module on the slot of headend equipment, is selected performance favorable industrial level wireless measurement module and device with the form fix of circuit board for use, can on relatively poor signal quality and lower signal level, accomplish the parsing to signal.Reliability and stability are high, adapt to work under rugged environment.
1) technical indicator:
（1）?Uplink:885MHz～889MHz,Downlink:930～934MHz；
(2) maximum transmission power: 33dBm ± 2dB;
(3) receiving sensitivity :-116dBm;
(4) signal strength measuring range :-110dBm～-47dBm;
(5) sampling rate :≤480ms.
2) main collection capacity:
The wireless coverage parameter:
Rxlev: received field strength in the area of coverage, monitoring range :-110dBm～-47 dBm.
RxQual: the quality of reception in the area of coverage, scope 0～7,0 expression is best, and 7 expressions are the poorest, correspond to BER (error rate):
| RxQual | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| BER | 0 | 0.20% | 0.40% | 0.80% | 1.60% | 3.20% | 6.40% | 12.80% |
C/I: with the frequency carrier/interface ratio;
C/A: adjacent carrier/interface ratio frequently.
3) image data is judged:
Rxlev :≤-95dBm, cover the feeble field district.
RxQual: >=3, downlink quality is poor;
C/I: < 12dB disturbs big.
C/A: < 6dB disturbs big.
2, data transmission unit:
Accomplish the transfer of data between headend equipment and the background server, comprise that test data is uploaded, software download, control and assignment instructions issues, warning information is uploaded etc.
1) implementation of transmission channel: base station, near and remote machine are provided to the pass-through channel of background server; Wireless aps inserts pass-through channel; Headend equipment adopts the wifi technology to insert wireless aps.
2) GPS module (optional):
Select high accurate GPS chip (SiRF Star III, precision: 3～10 meters) for use, guarantee the reliable reception gps signal.
3) local AM access module:
Various communication interfaces are provided.
(1) local debug port: equipment is provided with operations such as inquiry, software upgrading through PC;
(2) antennal interface: connect GSM-R antenna and wifi antenna.
4) power module:
Power module is mainly accomplished voltage stabilizing and the function of backup battery is provided.Dispose unified external power supply input port, the direct current supply interface is provided, external 220 volts of alternating current conversion equipments are provided.
5) mainboard:
CPU:1GHz, internal memory: 1G.
The concrete application approach of the present invention is a lot, and the above only is a preferred implementation of the present invention, should be understood that; For those skilled in the art; Under the prerequisite that does not break away from the principle of the invention, can also make some improvement, these improvement also should be regarded as protection scope of the present invention.
Claims (4)
1. realize that the GSM-R signal covers and the device of QOS condition monitoring for one kind, it operates in the existing railway optical fiber repeater near and remote machine system, and railway optical fiber repeater near and remote machine system comprises the near-end machine, the some remote terminations that link to each other through optical fiber with the near-end machine; It is characterized in that; Each remote termination links to each other with corresponding GSM-R system front end equipment; Ethernet high speed pass-through channel is provided between near-end machine and the remote termination; The near-end machine then is connected to the base station, and the base station links to each other with OMC equipment through ethernet network again, and OMC equipment links to each other with database server and client again.
2. the device of realization GSM-R signal covering according to claim 1 and QOS condition monitoring; It is characterized in that; Said GSM-R system front end equipment comprises mainboard, and mainboard is provided with general-purpose interface, and said general-purpose interface connects GPS module, GSM-R acquisition module, voice evaluation module, memory module, WiFi module and AM access module respectively; Wherein AM access module links to each other with remote termination, is perhaps linked to each other with remote termination through wireless aps by the WiFi module.
3. the device of realization GSM-R signal covering according to claim 2 and QOS condition monitoring is characterized in that said AM access module is the optical module with 100Mbps Ethernet high speed pass-through channel.
4. the device of realization GSM-R signal covering according to claim 2 and QOS condition monitoring is characterized in that said mainboard also comprises USB Hub expander and controller, and both are connected with general-purpose interface respectively.
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| CN105491595A (en) * | 2015-11-24 | 2016-04-13 | 北京交控科技股份有限公司 | Train-ground communication wireless road test system and method |
| CN108540992A (en) * | 2017-03-02 | 2018-09-14 | 通号通信信息集团上海有限公司 | A kind of system for mobile unit on-line real time monitoring |
| CN108847890A (en) * | 2018-06-26 | 2018-11-20 | 陕西红柠铁路有限责任公司 | Signal network topological structure of the digital plane shunting system in complex region |
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| CN108847890A (en) * | 2018-06-26 | 2018-11-20 | 陕西红柠铁路有限责任公司 | Signal network topological structure of the digital plane shunting system in complex region |
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Application publication date: 20121128 |